All assignees
766 prefixes in 346 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 346-600 | HUMBLE | 903C | 2015-03-25 | Yes |
| 346-601 | HOUSTON | 004F | 2022-10-20 | Yes |
| 346-602 | BAYTOWN | 6534 | 2022-10-28 | Yes |
| 346-603 | ALVIN | 6506 | 2022-11-02 | Yes |
| 346-604 | LANGHAMCRK | 6506 | 2022-11-15 | Yes |
| 346-605 | HSTNSUBURB | 5562 | 2022-11-22 | Yes |
| 346-606 | BAMMEL | 6701 | 2017-03-16 | Yes |
| 346-607 | HOUSTON | 5562 | 2022-11-22 | Yes |
| 346-608 | KATY | 6114 | 2022-12-01 | Yes |
| 346-609 | BAMMEL | 7138 | 2022-12-13 | Yes |
| 346-610 | HOUSTON | 903C | 2018-09-13 | Yes |
| 346-611 | XXXXXXXXXX | MULT | — | — |
| 346-612 | CLEVELAND | 6701 | 2022-12-13 | Yes |
| 346-613 | HOUSTON | 004F | 2022-12-20 | Yes |
| 346-614 | HSTNSUBURB | 004F | 2022-12-21 | Yes |
| 346-615 | KATY | 903C | 2023-02-08 | Yes |
| 346-616 | HUMBLE | 6114 | 2015-12-22 | Yes |
| 346-617 | DICKINSON | 6701 | 2015-12-22 | Yes |
| 346-618 | HOUSTON | 318J | 2023-02-23 | Yes |
| 346-619 | HOUSTON | 732J | 2023-02-16 | Yes |
| 346-620 | RICHMNRNBG | 6534 | 2023-01-03 | Yes |
| 346-621 | HOUSTON | 208K | 2025-07-30 | Yes |
| 346-622 | BAMMEL | 965H | 2021-08-12 | Yes |
| 346-623 | SATSUMA | 6534 | 2023-01-03 | Yes |
| 346-624 | LANGHAMCRK | 516J | 2022-01-14 | Yes |
| 346-625 | SPRING | 6701 | 2023-01-05 | Yes |
| 346-626 | SUGAR LAND | 516J | 2022-03-24 | Yes |
| 346-627 | HSTNSUBURB | 616J | 2023-03-09 | Yes |
| 346-628 | HOUSTON | 6701 | 2023-01-12 | Yes |
| 346-629 | RICHMNRNBG | 6701 | 2023-01-05 | Yes |
| 346-630 | BAYTOWN | 6701 | 2023-01-04 | Yes |
| 346-631 | RICHMNRNBG | 6701 | 2023-01-05 | Yes |
| 346-632 | RICHMNRNBG | 6701 | 2023-01-05 | Yes |
| 346-633 | DEER PARK | 903C | 2021-01-04 | Yes |
| 346-634 | CYPRESS | 6534 | 2023-01-18 | Yes |
| 346-635 | HSTNSUBURB | 318J | 2023-03-10 | Yes |
| 346-636 | BAMMEL | 903C | 2022-11-16 | Yes |
| 346-637 | KATY | 516J | 2022-01-14 | Yes |
| 346-638 | HOUSTON | 6701 | 2023-01-12 | Yes |
| 346-639 | HSTNSUBURB | 516J | 2022-01-10 | Yes |
| 346-640 | LANGHAMCRK | 624H | 2021-01-04 | Yes |
| 346-641 | DEER PARK | 6534 | 2023-04-17 | Yes |
| 346-642 | HSTNSUBURB | 598J | 2023-03-16 | Yes |
| 346-643 | SPLENDORA | 903C | — | Yes |
| 346-644 | DICKINSON | 622J | 2021-09-07 | Yes |
| 346-645 | TOMBALL | 903C | 2020-11-06 | Yes |
| 346-646 | HOUSTON | 903C | 2020-11-13 | Yes |
| 346-647 | MISSOURICY | 516J | 2022-01-14 | Yes |
| 346-648 | HOUSTON | 6701 | 2023-01-12 | Yes |
| 346-649 | HOUSTON | 6701 | 2023-01-12 | Yes |
| 346-650 | VLY LODGE | 318J | 2023-04-28 | Yes |
| 346-651 | HOUSTON | 436J | 2023-05-05 | Yes |
| 346-652 | CYPRESS | 6701 | 2023-05-08 | Yes |
| 346-653 | DICKINSON | 6701 | 2023-05-09 | Yes |
| 346-654 | PINEHURST | 903C | 2022-12-21 | Yes |
| 346-655 | ROSHARON | 903C | 2020-11-16 | Yes |
| 346-656 | LANGHAMCRK | 903C | 2022-11-16 | Yes |
| 346-657 | CYPRESS | 6534 | 2023-05-11 | Yes |
| 346-658 | RICHMNRNBG | 6534 | 2023-05-11 | Yes |
| 346-659 | HSTNSUBURB | 598J | 2023-05-18 | Yes |
| 346-660 | BAYTOWN | 624H | 2021-02-03 | Yes |
| 346-661 | LANGHAMCRK | 6506 | 2023-05-18 | Yes |
| 346-662 | HUMBLE | 903C | 2022-12-29 | Yes |
| 346-663 | HIGHLANDS | 903C | 2022-11-16 | Yes |
| 346-664 | BAMMEL | 6701 | — | Yes |
| 346-665 | HOUSTON | 7138 | 2023-04-06 | Yes |
| 346-666 | CYPRESS | 903C | 2015-04-16 | Yes |
| 346-667 | KATY | 965H | 2020-06-18 | Yes |
| 346-668 | BAMMEL | 6701 | 2023-06-02 | Yes |
| 346-669 | BAMMEL | 6701 | 2023-06-02 | Yes |
| 346-670 | BAMMEL | 6701 | 2023-06-02 | Yes |
| 346-671 | BAYTOWN | 6534 | 2023-06-08 | Yes |
| 346-672 | SPRING | 6506 | 2023-06-14 | Yes |
| 346-673 | HSTNSUBURB | 6701 | 2023-06-20 | Yes |
| 346-674 | HOUSTON | 6114 | 2023-06-12 | Yes |
| 346-675 | HSTNSUBURB | 6701 | 2023-06-20 | Yes |
| 346-676 | KEMAH | 903C | 2023-01-20 | Yes |
| 346-677 | BAYTOWN | 965H | 2020-06-22 | Yes |
| 346-678 | HSTNSUBURB | 6701 | 2023-06-20 | Yes |
| 346-679 | DICKINSON | 6506 | 2023-07-06 | Yes |
| 346-680 | HSTNSUBURB | 903C | 2023-07-11 | Yes |
| 346-681 | SUGAR LAND | 903C | 2023-07-11 | Yes |
| 346-682 | CROSBY | 903C | 2024-03-28 | Yes |
| 346-683 | WESTFIELD | 903C | 2023-07-19 | Yes |
| 346-684 | SATSUMA | 903C | 2023-07-28 | Yes |
| 346-685 | HUMBLE | 903C | 2023-08-01 | Yes |
| 346-686 | MANVEL | 903C | 2023-08-01 | Yes |
| 346-687 | CLEVELAND | 6534 | 2023-08-08 | Yes |
| 346-688 | MANVEL | 965H | 2021-05-10 | Yes |
| 346-689 | LANGHAMCRK | 6506 | 2023-08-10 | Yes |
| 346-690 | RICHMNRNBG | 6534 | 2023-08-15 | Yes |
| 346-691 | RICHMNRNBG | 6506 | 2023-08-29 | Yes |
| 346-692 | HOUSTON | 839J | 2023-08-29 | Yes |
| 346-693 | HSTNSUBURB | 490J | 2023-09-07 | Yes |
| 346-694 | BARKER | 903C | 2023-09-28 | Yes |
| 346-695 | TOMBALL | 903C | 2023-09-28 | Yes |
| 346-696 | DICKINSON | 903C | 2023-09-29 | Yes |
| 346-697 | RICHMNRNBG | 6701 | 2023-09-29 | Yes |
| 346-698 | RICHMNRNBG | 6701 | 2023-09-29 | Yes |
| 346-699 | HSTNSUBURB | 965H | 2021-05-10 | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.